Elastic tire.



PATENTED JAN. 30, 1906.

J. E. HOPKINSON.

ELASTIC TIRE.

APPLIGATIQN FILED AUG. 15. 1905.

A.. 4 9 0 1 oo JOHN EBENEZER HOPKINSON, OF WEST DRAYTON, ENGLAND.

ELASTIC TIRE.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed August 15,1905. Serial No. 274.348.

T all whom, it www con/cern.'

Be it known that I, JOHN EBENEZER Hor- KINsoN, manufacturer, a subject of the King of England, and a resident of West Drayton,

` y in the county of Middlesex, England, Ahave invented a certain new and useful Im rovement in Elastic Tires for Road-Vehc es, of which the following is a '1"1 ill, clear, and exact description.

1o This invention relates to an improvement in that class of elastic tires in which the rubber is clamped in such a manner that it is forced radially inward of the wheel.

The invention consists in so shaping and forming the cheek-plates upon their internal faces that they assist the lateral compression caused by the flanges and tend to increase or accentuate the pressure of the rubber tire into the bed of the rim. I effect this by usin a rentrant flange with serrations upon the internal faces, these serrations entering into the tire and forcing it to take the desired position in the rim.

- The invention is illustrated upon the accompanying drawings, in Which- F1gure 1 is a sectional elevation of a tire of the ype described fitted with cheekplates made according to this invention. lfigs. 'l and 3 are detached views in crosssection and side elevation of the cheek-plate.

The Atire a is mounted upon a concave metal ring t, shrunk upon the felly c of the wheel. Upon the sides of the felly are secured, by means of bolts d or otherwise, cheek lates e e. These cheek plates are shaped interiorly at e e to the concavity of v the ring b and are provided with renteringflanges ff and undercut or recessed portions y. The bed of the rim for the tire is thus ormed by the concave ring b and the adjoining faces e c of the cheek-plates e, and the curve of this bed is more pronounced than the curve of the b so f the tire a. The protuberances'a/ at the base of the tire extend into thef'recesses g of the ilange-plates e e. The cheek-plates are provided at f f with projections or serrations which are'adapted to press into the tire.

This arrangement is of importance, since it affords a direct thrust from the point f into the central part of the bed of the rim. The lateral pressure which in this type of tire is brought to bear upon the rubber is now exerted throu h the teeth f which are set'at. such an ange that the resultant thrusts (1ndicated by the broken lines in Fig-1) meet at about the center of the bed of the rim.

As the bolts d are being fastened or tightened up, the teeth f clearance between the edge of the protu'oerance at the base of the rubber and the recessed ortion g of the plate. /Vhen the cheekates are finally in position, the serrations f prevent the rubber' creeping around the rim.

Having thus described my invention, what I claim as such, and desire to secure by Letters Patent, is-

1. In a tire, the combination with a concave rim and a rubber tire extending across said rim, of cheek plates adapted to co mpress the rubber laterally, of rentering flanges upon the cheek-plates and of serrations upon the inner faces of the flanges arranged to thrust the tire into the concave rim.

2. In a tire, caved rim and a base than the rim, entering flanges and interior faces of the flanges the sides of the rubber tire.

3. In a tire, the combination with a felly, a ooncaved ring mounted on the felly, and a rubber tire having a base of less curvature than the rim, of cheek-plates secured upon the sides of the felly, undercut recesses upon the inner sides of said cheek-plates, rentering flanges at the peripheries of sfid ch eek-p. :ttes and serrations upon the iraer sides of the flanges, adapted to press into .the rubber tire.

4:. In a tire of the class described, cheekplates having rentering flanges fitted with serrations adapted to force the tire into its rim.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JOHN EBENEZER HOPKINSON.

the combination 'with a conrubber tire having a flatter of cheek-plates having reof serrations upon the which bite into Witnesses:

Vieron F. FEENY, Cram J.

are the first part of the plate L, to bear upon the rubber, there belng a slight 

